proliferation
B1CEFR level
35/100Rarity: fairly common
TechnicalRegister
Medicine noun
Rapid reproduction and multiplication of cells.
The Ki-67 index quantifies the proportion of cells undergoing proliferation and gauges tumour aggressiveness.
Business noun
A rapid, often excessive increase in the number of variants or items.
Unchecked SKU proliferation buried the warehouse in slow-moving stock.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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